Crinkling paper



Aug. 4, 1925. 1,548,787

W. A. LORENZ CRINKLING PAPER Filed Oct. '25, 1920 2 Shets-Sheet 1 Fzyi Jnwzifar; mliz'am flwallorenz Aug. 4, 1925.

w. A. LORENZ CRINKLING PAPER Filed Oct. 23, 1920 2 Sheets-Sheet 2 paper.

'Pat'ent ecl Aug. 4, 1925.

.. UNITED STATES 1,548,787 PATENT OFFICE.

WILLIAM A. LORENZ, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE OTAKA FABRIC COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

CRINKLIN G PAPER.

7 Application filed October 23, 1920. Serial No. 418,961.

To all whom it may concern:

Be itknown that I, lVIn-LIAM A. LORENZ, a citizen of the United States, residing in Hartford, in the county of Hartford and State of'Connecticut, have invented certain new and useful Improvements in Crinkling Paper,-of which the following is a specification.

This invention'relates tomeans for crinkling or otherwise forming or working It is the practice to dampen paper as it advances from the supply-roll and lead the moistenel paper around a cylinder, and crush it against a stationary doctor-blade which both crinkles the paper in lines transverse to the web and strips the same from said cylinder. In many instances, as for example, when the .paper web is sized too highly, the water does not work well into the paper before the latter is delivered onto the surface of said crinkling cylinder.

The furthendifliculty arises, that where the water permeates the paper, the latter expands locally, and as the consequence of such expansion, irregular 'wrinkles are formed longitudinally'and diagonally in the web,

-' and even'dampening ofthe web, and moreder and into the which spoil the appearance and-depreciate the value of the finished crinkled paper.

One of the objects of .the invention is to avoid the formation of such wrinkles, which usually extend irregularly along the web.

To this end, there areyformed numerous fine grooves in the cylinder, placed closely together, and preferably running around the cylinder ;'and there is arranged a soft roll or device to press the paper against the cylinooves, thereby forming lines in theweb an taking up the lateral expansion thereof, due to the water soaking into its fibre; and by this-means the formation of the above-mentioned irregular wrinkles is avoided.

Another feature of the invention relates to a preliminary treatment of.the web, which has the advantage of rendering the web more permeable to water, this insuring a full proceed more rapidly; and this preliminary treatment'otherwise brings the paper-to better condition for crinkling or other working. This preliminary ,treatment involves the bending and breaking of the fibres of the aper; This may be done b passing the web between pressure rolls which have fine havethe corrugations arranged longitudinally, and asecond pair may have fine peripheral corrugations, so that the fibres may be bent or broken in lines transverse to one another. This renders the paper more permeable to water, and also in better condition to be crinkledby the doctor-blade, or otherwise worked. One of the advantages of the preliminary corrugating is that the paper may-be brought to a dryer'condition before it reaches the doctor-blade, so that the crinkled paper will be .-found to be more elastic and less apt to lose its shape orcondition.

In the drawings there is illustrated a masurface corrugations. One pair of rolls may chine in which the paper is first corrugated longitudinally with fine corrugations, and

then corrugated transversely with fine corrugations, and then moistened and then pressed into thefine peripheral corrugations on the crinkling cylinder, and finally crinkled against the doctor-blade; but'it will be understood that features of the invention.

may be used without others, as for example,

the preliminary corrugating of the web may Figure 1" is a plan of the preferred form of a machine for practicing the invention in 'oneway. v

Figure 2 1s a sectional elevation-taken at about line 22 Figure 1.

Figure 3 is a sectional elevation on a larger scale taken atabout the line 3-3 of Figure -1.

- Figure 4 is a sectional elevation of adjustable corrugating roll bearings taken at the line 4-4 of. Figure 3.

Figure 5 shows a view on a larger scale of the preferred finely corrugated or knurled surface of the crinkling cylinder.

The paper-is led from a supply-roll 10, which is retarded by a weighted brake-strap 11, and-passes over an introductory roll 12,"

and thence' between a pair of finely lined rolls 13, 14 are peripheral. whereby the web is longitudinally marked or fluted with paper, because ot'its'moist condition. is adapted to yield slightly to this stretching tendency; At the same time, wherever there happens to be any local expansion of the sheet due to the wetting, the effect of said .roll i32is to pack the excess of paper down slight fine corrugations, as seenjat, 16,.Eig into the grooves of the cylinder. This overure 1. The ridges on the roll 13 mesh with the grooves on the roll 14,, and produce in the paperlines or fine corrugations that are so shallow that the paper is not ruptured, since there is no need to put undue strain or tension on the fibres.

The finely fluted web now passes between li'luberin'g roll's 17 18, which are longitudi nally grooved at 19, the 'rolls running in mesh whereby the longitudinal'fluted web is also cross-corrugated or fluted, as at 20, Fig ure 1.

ing of the fibresof the paper which is -now in condition to successfully undergo the subsequent operation or operations thereon. In

' the form of the invention illustrated, the

' ess.

will rapidly absorb moisture applied thereweb remains in flat condition at the completion of the'fibre-breaking or bending proc- It may be readily/moistened, since it to. The vweb is led from the rolls 17, 18, over a roll 21, or between roll 21 and a power-driven drum .22; water being applied tothe cross-fluted paper from a sprinkler pipe 23. -It will -be understood that the paper may, if desired, be wet upon both sides before winding around said "drum 22,

,..the lower rolls 13, 14 are provided with drive pinions 30 30", Figure 3, to mesh with 28, 30, respectively. It will also be understood that the corru gations on the sheet, whether longitudinal or transverse or both, are of advantage in rendering the paper more permeable, or better adapted to absorb the moisture, even though the drum'22, which is. a crinkling drum or cylinder, be provided with a smooth surface; but one of the improvements illustrated in the drawings consists in providing lines or fine peripheral superfioial grooves 31in; said drum, into which the web is pressed by a soft rubber or other soft pressure roll 32. In forcing the paper into the grooves on the cylinder, the soft roll 32 tends to stretch the paper sidewise, and the This slight cross-corrugation com. plates the preparatory bending and break- A train of comes the tendency which would otherwise exist. of the locally over-expanded portions of the paper to produce serious folds or wrinkles 1n the web.

The paper is carried around by the cylin der 22 against a doctor-blade 33, which crinkles the papertransversely and strips it from the cylinder at 34; the crinkled paper being led away upon a deliv y-belt mechanism 35.

ltwitl he understood that the paper must be crushed against the stationary doctor blade with some force, in order to effect the desired wrinkling. For this purpose, the paper must cling to the crinkling cylinder 22, and the adherence is'secured'partly by the inoistening of the paper and partly by the pressing of the moist aper'against the cylinder by the roll 32, he adherence beeoming stronger by reason of the grooved condition of the cylinder, since the paper sticks more tightly when pressed into the grooves than would be expected when more ly pressed. against a smooth-surfaced cylinder.

The roll 32 may be driven by a pinion 36, meshing with the main gear 24. All of the rolls that operate upon the paper may be provided with pressure-regulating de-- vices, seen at Figure 4. The end of the roll shaft 37 may rotate in a bearing block 38,

which maybe adjustable up and down in a. housing 39, and may rest upon an adjustable support in the form of a screw 40. This permits the rolls in each pair to be set as closely together as desired. The pressure of.

one roll against the other is producedby' a spring 41, whose power is regulated by screw 42 having a locknut 43.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I

1. The process ofcrinkling a web, comprising bending or breaking the fibres of the web, applyingmolsture to the web, and then carrying the web against a doctor-de- "vice or obstruction to crinkle the same.

2. The combination of means to produce numerous fine preliminary corrugations or markings in a web. means for moistening the web, and means for crinkling the web.

e 3-.-The combination of means for producing numerous fine longitudinal corrugations in a web, means for producingv numerous fine transverse corrugations in said web, and means for crinklin'g-the web.

' ducing preliminary fine numerous markings 4. The combination of means for producing numerous fine longitudinal corrugations in a Web, means for producing numerous fine transverse corrugations in said Web, means for moistening the Web, and means for crinkling the Web.

5. The combination of means for proin a Web, means for moistening the Web, means for shrinking the moist'web by formmg corrugations or the like therein, and means for crmkhng themveb.

6. The combination of a pair of meshmg corrugated rolls for corrguatmg a- Web in one direction, a second pair of meshing corrugated rolls for corrugating the web in a transverse direction preparatory to Working the Web, means for moistening the web, and means for effecting the desired working of the web.

7. The combination of a pair of meshing corrugated rolls for corrugating a web in one direction, asecond pair of meshing corrugated rolls for corrugating the web in a transverse direction preparatory to Working the Web, means for moistening the Web. and means for crinkling the web transversely.

8. The combination of a pair of meshing corrugated rolls for corrugating a web in one direction, a second pair meshing corrugated rolls for corrugating the web in a.

transverse direction preparatory to working breaking the surface of sized paper or heavy paper, to facilitate the absorption of Water by the interior portionsof the paper, means for applying moisture to the paper, and means for crinkling the paper, including a crinkling cylinder and a doctor-blade or crinkling device.

10. The herein-described process, comprising breaking the surface of sized or thick paper to allow moisture to penetrate the interior of the paper, wetting the paper, and

crinkling or working the paper into the desired condition.

WILLIAM A. LORENZ. Witnesses:

hlARHAHET T. DENNIS, Wu. A, Zmsnn. 

